Receiver Tube ReplacementReplacement Receiver Tubes for Original Hammock Mount and Mammoth Mount models. Please note this does not include a Hitch Pin, or the Bolt for mounting the receiver tube. Receiver Tube Options: #1: 2in Standard Length Receiver Tube. This works for most applications (4" and 5" from hitch pin hole to frame). If your hitch is close to flush with your bumper, this length will work for you. Fits Class III, IV, and V hitches (reducer sleeve required if